浙江大学学报(工学版)  2018, Vol. 52 Issue (6): 1201-1208    DOI: 10.3785/j.issn.1008-973X.2018.06.020
 工程力学

Numerical simulation of free surface flow over solid obstacles based on high-order accurate scheme
GAO Guan, ZHU Rui, HE Zhi-guo, YU Ching-hao
Ocean College, Zhejiang University, Zhoushan 316000, China
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Abstract:

A sharp interface capturing method was presented to simulate free surface flow over a stationary obstacle. The efficient interface preserving level set method was used and immersed boundary method was interpolated to handle the air-water and solid-fluid interface. The artificial momentum forcing term was applied at computational nodes where the solid obstacle presented to solve the velocity field, accounting for the impact of the obstacle. The upwinding combined compact difference scheme was adapted to approximate spatial derivative terms in level set function in order to accurately predict the air-water interface. The re-initialization equation for distance function was used to ensure interface front with a very thin thickness. The pressure field of Navier-Stokes equations was effectively solved by the projection method. Two typical cases of the flow propagating over different obstacles, including rectangular and circular cross-sections, were simulated by the method. The numerical results accorded well with the experimental results. The method can accurately simulate the complicated free surface flow with good stability.

 CLC: O357

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GAO Guan, ZHU Rui, HE Zhi-guo, YU Ching-hao. Numerical simulation of free surface flow over solid obstacles based on high-order accurate scheme. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(6): 1201-1208.

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